Adelle theme not working on mobile using wifi

Having an odd issue. The mobile theme for Adelle is disabled as it optimises without enabling the theme. However, when I am on 3G it works perfectly, when I am on wifi it breaks. Any help would be great.

When I enable the mobile theme the optimisation is wrong - it shows the full site but not formatted correctly.

Adelle is a responsive width theme. Responsive width means the layout adapts depending on the size of the device being used to view your site. When responsive width themes are viewed on mobiles sidebars appear below the posts in order to provide as much space as possible for reading.

thanks a lot for your reply. the mobile theme is already disabled
the issue comes when I connect to wifi, it seems to break but works
perfectly on 3G. just trying to work out why wifi would break it. have taken some screenshots but can't seem to attach.